Carbureter.



-f' WILLIAM F. Borne, or EAST s'r. LOUIsl ILLINOIS, AND EARLE E. cULP, or sT. LOUIS,

Missen-ai.

Specification of fetters Patent.

Patented Apr. 9, 1912.

Application led February 27, 1911. Serial No. 611,180.

To all whom imag concern Be it known -that we. VILLIAM F. RorHE, a citizen of the.United States, and a resident of East St'. Louis. in the county of St. Clair and State CUL?, a citizen of the United States, and a resident of the cit;v of St. Louis and Statev of Missouri, have Improvement in Carbureters, of which the following yis a specification.

This Invention relates to carbureters and `more particularly to those used in connection with internalcombustion motors.

It has for its principal ob]ects to secure a proportional and correlated action of the oil and air valves, to provide for varying the proportional correlation between the air and oil valves, to secure a thorough mixture of the air and vapor, to provide for automatically increasing and 'decreasing the supply of oil to suit changes in th'e speed of the motor, and to attain certain other advan- ,tages hereinafter more fully appearing.

The invent-ion consists in- .the4 parts4 and in the arrangements and combinations of parts hereinafter described and claimed.-

In the accompanying Adrawing which `forms part of this specication and wherein v.so

like symbols refer .to like parts wherever they menig-Figure l is a vertical sectionl through a carbureter embodying our Inven- I" tion; Fig. 2 isa horizontal section on the line 2-2of F ig.l 1; and Fig. 3 is a fragmentary View, on an enlarged scale, illustrai ing the construction and arrangement of the adjust-able' oil feeding device.

As shown in the drawing, the casing or shell of the carbureter comprises three sepazrahle. sections; namely, an upper section 1, containing a mixingchamber le; an intermediate section 2, containing an vair chamber 2a; and' a bottom section 3, containing an oil reservoir or supply' chamber 3a. In the bottom of the oil reservoir or chamber 3a is a passageway 4, which communicates with a supply pipe 5 through a strainer 6 in a small receiving chamber The passageway 4; 1s controlled-by a Valve 8 whose stem 9 extends up into thereservoir 3"i and has a cork or other suitable float- 10 secured thereon-by cross-bars or plat-es 11. The Hoat is adapted to. lift-.-the valve Y8 and thereby close the Z passageway 4: whenthe oil or liquid hydrog th of illinois, and EARLE invented a new and useful lem-bon has reached. a. certain level in the' reservoir. By this arrangement the general I su pply of oil or hydrocarbon may be kept in a large gravity tank (not shown) and 'conducted through the pipe 5; and the liquid in the reservoir 3a is maintained ata substantially uniform level. as the float rises and falls and closes andl opens the valve 8 upon the rise and fall of the level of the liquid in the reservoir.

The central portion of the lower horizontal partition'12 which separates the air chamber 2Z1 from -the reservoir 3a is de pressed, as at 13, to providean oil cup or receptacle. A boss 14 is formed on the bottom of the oil cup 13 and provided with a screwthreaded vert-ical bore inwhich is fitted the screw-thread lower end portion of a tube 15. The-tube 15 is provided with a series of perl forations 16 adjacent to the boss .let or bottom of the oil cup 13 and asecond set of perforations 17 above said firstmentioned set. Preferably, the perforations of each series 16 and 17 are arranged 'in two spiral setsst-arting and ending at diametrically opposite points on opposite sides of the tube.

Slidably fitted in the tube 15 is a cylindrical valve-block 1S of sutlicient length to cover all the openings inthe series 17; and extending from the lower end of the'valveblock 18 is a rod 19 which is adapted to bear against the upper end of the valve-stem 9. Extending from the upper end of the Valveblock is a rod 2O having a knob 21 on its outer end. rEhe rod 20 slides through a bore in a screw-plug 22 in the upper end of the tube` 15. A. collar 23 is secured to the rod 20 and ad ed'to bear against theinner end of the screw-plug 22; and interposed between the collar 25% on the rod 2O and a stop or shoulder 211 inside the tube 15 and above.'

the valve 18, is aspring 25 whichl normally holds the collar 23 in contact with the end of the screw-plug22. By this arrangement the rod 2G may be depressed to move the rodl 19 into Contact with the valve-stem@ thereby depressing the Val-ve 8, so. as to open come munication between the. supply pipe 5 and reservoir 3a, when it is desired to iloodthe oil cup in priming or starting the motor.

Slidably fitted over the tube-15 is a .sleeveV n whose lower end .portion lnormally .coensf )g-05.5. e Series Qf perforationsl 17o-:constituting a carbureting chamber.

-lo'vve-r end portion 21 of the funnel isflared toppositely to the flare of the upper portion and projects into the oil cup 13. The mididle portion of the air valve 27 is. dished uplwardly,'as at 32, and is vprovided with an :annular series of perforations 33 which normally establish communication between the funnel or carbureting chamber 30 'and the` lmixing chamber 1a when the marginal por-l and on'whose upper end portion is mounted a circular valve 27. The marginal portion of the valve covers an annular series of per- --forations 28.]in the partition 29 which sep- Va'rates the air vchamber 2a from the mixing chamber la.v

Preferably, the. upper partition 29 --is vdished or formed .concavo-convex and is provided at its middle with an opening and depending. annular portion or funnel 30 The tion ofthe valve is closed against the partition 2 9. l The valve 27-is resiliently held seated on the partition 29 by a spring 34: which bears. at one endagainst the top of the valve and at its opposite end against ascrew-plug fitted into a screw-threaded opening inthe *casing 1. The plug 35 is provided with an .axialbore in which is slidably fitted a bushling 36 IWhose inner end portion serves as a stop-to limit the upward movement of the .valve 27. The bushing 36 is provided with -a screw-threaded bore adapted to receive the screw-threaded upper end port-ion of the l4 tube 15.1 By this arrangement, the tube 15 may be adjusted in the screw-threaded boss i v 14 of the oil cup 13, so that one or all of the lower series of perforations 16 may be opened; and, as the tube 15 is raised or lowered to accomplish this adjustment, the

bushing 36 of course has to be adjusted in or out on the tube, as the case may be, to properly locate its inner end portionvvith respect tothe valve 27 forwhich it serves as a stop. Also, 'by 'adjusting the screw-plug 22in and out`, the'valve-block 18 maybe moved tol close or open one or the entirey upper series of perforations 17. A

The mixing chamber 1a is provided with anv outlet opening 37 which is controlled by afthrotitle valve 38 and adapted for connection with the intake opening of an internal combustion motor. l y' An air'l intake pipe 39 communicates with the air chamber [2a through thel passageway 40. In some `cases said pipe 39` may be ex` y tended, in any obvious manner, in proximity to the exhaust pipe or some portion of the motor sothat the air which is taken into thecarbureter: will be heated.

-In 'the operation ofthe carbureter, the

'tube 15 'is' adjusted 'so that the proper number/of .the openings 16 are clear of the top ,edge of-the boss 14. to admit suiicient oil for combustible mixture for the low speed of the motor. On the suction stroke of the piston, the air is drawn into the chamber 2a around the outside of the funnel or carburetingchamber 30, thence down into the oil cup 13 where it takes up the oil therein, and thence up through the funnel and perfora-l tions 33`into the mixing chamber 1. case there is no oil in the cup 13, the suction created by the piston of the motor and the,

air which is drawn past the perforations 16 in the oil tube 15, draws the oil from the.

reservoir 3a up into the tube and out through said perforations. 'Vhen the throt- In Y tle is opened more fully andthe motor is running at a higher speed, the valve 27 will i be lifted against the tension'of the spring 34 and the openings 28 in the partition 29 are uncovered so that a portion of the air passes vinto the mixing chamber through said pervalve-block 18, is moved against the valve' stern 9 vand the valve 8 is depressed so that the oil in the chamber 3iL reaches a level with the openings 16 which are exposed above the boss 1-1. The oil then flows into the cup 13. By keepingthe valve 8 open, in some cases, the oil may reach a level with the bottom of the partition 12 and flow through the vent openings 12a in said partition and into the air chamber 2a; or, in case Hence, i

les

the oil does not reach a level so high, the

vapors which may have accumulated on top of the oil in said chamber 3a will be forced through said vent openings 12EL into the chamber 2a by the body of oil rising in said chamber 3e. Hence, when the engine is cranked, the air is drawn through the pipe 39 into the chamber 2a and through the oil cup 13 and funnel 30 and a mixture rich in hydrocarbon vapors is drawn into-the lcombustion chamber of the engine.

As above set fort-h, a more or less number of the perforations 16 may be openedv to supply a greater or smaller quantityof oil, v

as required; and the valve-block' 18 may also be moved to uncover as-many'of the openings'17 as desirable or necessary in the operation of the motor. So, too, by regu'- lating the tension of the spring 34 and also by varying the position of the stop bushing" 36, the opening of the valve 27 carrying the sleeve 26' is controlled.

Obviously, the device admits-of considerable modification Without departing from uo f ias

I valve arranged to normally c lose said means our invention. Therefore, We do not Wish to be limited to the specic construction and arrangement shown.

What ive claim is:

l. A carbureter comprising an air chamber and a carbureting chamber communicating therewith, an. oil receptacle communieating With said air chamber and with said carbureting chamber, an oil supply 'tube extending' intosaid/oil receptacle "and intov said carbureting chamber, said oil supply tube having a series of perforations adapted' to communicate 'with said oil receptacle,

means for uncovering all or a portion of said pertoration's, said oil supply tube having a second set of perforatio-ns adapted to vcommunicate with said carbureting chamber, means foruncoveriiig all o r a portion of said second series -of perforations in said oil supply tube, an additional device adapted' to normally cover all of said second series of pertorations, and an air valve connectedto said additional device and adapted upon opening to actuate the same to uncover said second mentioned series of perforations.

2. A carbureter comprising comniunicat` ing carbureting and mixing chambers, an

air chamber having a normally open communication with said carburet-ing chamber,

said air chamber also having means of communication with said mixing chamber, a

of communication between said air chamber and mixing chamber, an oil` receptacle having a normally open communication `With said air chamber and Said carbureting chamtion-'between said air ,chamber and said mixing chamber so as to uncover said additional oil supply tube Aopening or openings when said valve is opened.4 g

3; A- carbureter comprising communicating carbureting and mixing chambers, an air chamber having a normally open communication With said carbureting chamber, said ,air chamber alsohaving means of communication with said mixing chamber, a valve arranged Jc o-'no'i'mally close Said"means of communication between said` air chamber--l and mixing chamber, an oilreceptacle having a normally open communication lwith said air chamber and said carbureting chamber, an oil supply tube having an opening ori'- openingscommunicating with said oil receptacle andan-additional opening or openings adapted tocommunicatc '-vvit-h'said car- .,buretingichamber, a devicefor normallyingclosifn" additonal openingor ppenings in the oil supply tube and connected.tev aforesaid valve controlling the' commumc-"I tion bet-Ween said air chamber and saidn'iixingcli-ainber so as to uncover said.additionalv opening or openings v upon theppeningof--v and means for lclosing Sad addi-l tional opening or openings in the' -oilfsup'f-f ply ,tube independent of the deviceWhicli' is connected to saidvalve.

4l. A carbureter comprising. a vertically 5 disposed casing which is circular in transver'se section, said casing being divide-drby two Ahorizontal partitions to constitute a mixing chambervin the upper portion thereof, an air chamber below said mixing chamber and an oilreservoir beloivsaid' air chamber, a centrally disposed carbureting chamber normally in continuous communication with said air chamberandwith said mixing chamber, said upper partition having an annular series of perforations disposed -around said carbureting chamber so vas to establish communication between saidA mixing chamber and said air chamber, a lift valve on said partition adapted to normally closesaid annular series of perforations, an oil supply tube extending cen-4 trally 'through the-carbureting chamber and into the oil reservoir, said oil supply tube having a series of openings adapted to com- .muni-cate With said carbureting chamber, v

and means or'normally closing apart of said openings in the oil tube and connected to said lift valve'which vcontrC-ils said annular series of perforations in thel upper parings in the oil Vtube aresuccessivelyuncov.-

ered proportionately tothe opening of said valve.l

5. A carbureter comprising a. casing. divided by vtwo horizontal partitions to constitute, respectively, a `mixing chamber,- an

i tition so-thatthe normally luncovered open- A:Los

air chamber below -said .mixing chamber,

and anoilY reservoir below said air .chamvber, lthe upper partition having acentral opening and a depending' annular portion surrounding the opening and` constituting a carbureting chamber, said-upper partition also 1 having an annular series fot-perfora- -t'ions therein, and the lower-partition having a central 'depression' constituting an' oilv receptacle',- an oil supply. tub-e4 extending vertically t-hroughthe bottom-of the oil receptacle and upwardly through' the carbureting chamber, vsaid Oil tube having a perforation therein adj acent to the bottom of the carburetingchamber, means a'for cover'-` ing and uncoveringsaid perforation in the.

oil supply-tube, a 'series of perforation's above .Said rst mentioned perforation in buretingjfchamben a.- sleeveslidably tted on said foil; '.tube.-l and normally covering said Second series of pertorationsl :said oil snpply tube', said second." mentioned series of perforati'ons openingintof the cartherein', and' amair valve mounted on said lsleeve'fand resting ormally on top of said upper partition la covering the annular series ici perforationstherein.

6. A'fcarbureter `comprising a casing divided by two substantially horizontal partitions to constitute, respectively, a mixing chamber, an air chamber beneath said mixing chamber, and an oil reservoir belowsaid air chamber, the lower partition being den-fp/essed at its center to constitute an oil r'eceptacle, and the upper partition having a central opening and a depending annular portion surrounding said opening and eX- tending into said oil receptacle and constatuting a carburetingv chamber, said upper. partition also having an annular series of` perforations surrounding its central open-' said oil supply tube and normally closing said secondy mentioned series of openings therein, and a valve mounted on said sleeve and resting normally `on said upper parti-V tion and covering the annular series of perforations therein, said valve having a series of perforations for establishing communication between said carbureting and mixing chambers.

7. A carbureter comprising a carbureting chamber, an oil supply tube having a multiplicity of perforations adapted to communicate with said carbureting chamber, means for adjusting said tube so 'thatv a part of said perforations 'are normally uncovered to -such communication, a device for normally covering the'other perforations against such communication, and means for automatically actuating said covering device to uncover the perforations proportionately as air is taken increasingly into said carbureting chamber.

8. A carbureter comprising a carburetiug valve. l

chamber having an open air inlet and an auxiliary air inlet, and a valve normally closing said auxiliary air inlet, an oil supply tube having a multiplicity of perforations adapted to communicate with said carbureting chamber, means for adjusting said tube so that a certain number of said perforations are normally open to such communication, means for covering the other nication, andv means for automatically uncovering said covered perforations proportionately to the opening of the auxiliary air 9. A carbureter comprisinga vertically 'disposed casing which is circular in transverse section, said casing being divided by two horizontal partitions to constitute a mixing chamber in the upper portion there- "of, an air chamber between said partitions and an oil reservoir in the lower portion thereof, said-air chamber having an airl inlet, the lower partition vdepressed centrally `and the upper partition having a central opening and depending annular portion extending into the depression in. said portionofthe upper partition constitutml a carbu-reting chamber, said upper partition having an annular series of perfore'in tions extending around said depending annular portion, a lift valve Von said upper partition adapted tonormally close said'annular series'of perforations, an oil supply tube extending centrally through said' carbureting chamber and communicating at its vperforations'normally against such commuy ,lower partition, said depending annu'jai lower end with said oil reservoir, ysaid'oil,

tube having openings adapted to communicate with said carbureting f chamber, and.

means for increasingly supplying oil to said carbureting chamber automatically as air is increasingly taken into the carbureter sufficiently toraise said valve onv the upper partition.

` 'Signed at St. Loma-Missouri, this 18th day lof February, 1911.

WILLIAM F. JROTHE. EARLE E, oULP. Witnesses:` l

G. A. PENNJNGTON, M. A. SnELToN. 

